A holder unit of an electronic watch for holding a battery for the latter in position within the interior space of the casing of the watch, in which a holding member is attached to the watch casing, main portion of the holding member being arranged in a hollow cylinder enclosing with small idle gaps around said battery and mounted in the manner mechanically independent from the driven device.

An electrical cell is secured in a trough shaped housing in a plate of a timepiece movement by a device located at the periphery of the housing. Said device comprises at least one member such as a washer with a cut-away edge held by means of a screw which moves it, from a rest position in which the cell is free, downwardly and inwardly into the housing to an operative position biting into the wall of the cell which is firmly held against a contact in the housing.

A time-piece the case of which contains a source of current in the form of an ordinary or storage-battery housed in a space closed by means of a plug, characterized by the fact that one of the two elements, casing and plug, is provided with a scale and the other one with a mark, so that when the plug is put in place, it can be adjusted to such an angular position that the mark indicates, at least approximately, with respect to said scale, the date at which the source of current has been put in place or the date at which this source must be replaced.

The invention is a battery holder which is used to hold a pair of batteries in a modular electronic assembly having a substrate, on which an integrated circuit is mounted, and a module cap, which is concentrically, slightly larger than the substrate. The battery holder includes a module frame having a front surface, which is concentrically, slightly larger than the module cap, a back surface and a sidewall. The module frame also has a portion of its sidewall extending above the periphery adjacent to its front surface and two holes, perpendicular to its front surface and adapted to hold the pair of batteries. The battery holder also includes a metal plate, which is secured to the back surface of the module frame, for holding the pair of batteries in place.

Electronic watch module is constructed of a spacer block, a substrate on the spacer block carrying electronic components thereon, and a cover over some of the electronic components. Basic rate control of the electronic watches is provided by a crystal which is mounted in a can. An opening in the spacer block receives the crystal can, and deflectable fingers on the spacer block restrain the crystal can in place.